Crescend Technologies UHFP10XXUL1 Users Manual

INSTALLATION AND SERVICE
MANUAL
CONTINUOUS DUTY
UHF POWER AMPLIFIER
Crescend Technologies 920 E. State Parkway Schaumburg, IL 60173
Copyright Crescend Technologies Rev O
Tel: 847 908 5400 Fax: 847 908 5408 Email: sales@CrescendTech.com Web Site: www.CrescendTech.com
GENERAL DESCRIPTION
1.1. INTRODUCTION
This manual contains information and procedures for installation, operation, and general maintenance of Crescend’s UHF Continuous Duty Power Amplifier.
1.2. PRODUCT DESCRIPTION
The Crescend Technologies UHF RF power amplifiers are design ed for trunking and conventional repeater applications. Rack mountable and designed to accept a range of input powers for a given rated output power, the amplifier covers a broad range of frequencies. Closed loop power control is used to maintain a constant output power under varying voltage, signal input, frequency and output load conditions. Several design features work to protect the amplifier under adverse conditions.
The amplifier front panel includes status LED indicators for DC and Alarm conditions. RF Input, RF Output, DC, summary alarm and power cutback connections are found on the back of the amplifier. A fan is used to cool the amplifier.
Table 1-1. Amplifier Functional Specifications
Frequency Range: 403 – 470 MHz Operating Voltage: +13.8 ±0.7 Vdc Current Consumption: See Table 1-2 Duty Cycle: 100% Power Input: See Table 1-2 (Range Set at Factory) Power Output (Single Carrier Operation): See Table 1-2 (Set at Factory) Power Output Change (Relatively set up value) + 1 dB (Maximum) Input Return Loss: -10 dB (Maximum) Spurious & Harmonics: - 65 dBc (Maximum) Input/Output Impedance: 50 Ohms (Nominal) Load VSWR Tolerance: VSWR Protected above 3.5:1 (Nominal) Input/Output Connector: Type N Female Vertical Mounting: 7.0 in Horizontal Mounting: 19.0 in Weight: 10 lbs (4.6 kg) (Nominal) Cooling Method: Fan Forced Air Over Heat Sink Operating Temp. Range: -30°C to +60 °C Storage & Transport: -40 °C to +70 °C Humidity: 80% at +40 °C (Non-Condensing) Altitude: 10,000 Feet (Maximum)
INDICATORS
Front Panel Display:
Alarm and Control Pins:
DC ON (Green), LOW OUTPUT (Red), HIGH VSWR (Red), OVER TEMP (Red)
SUMMARY ALARM
Summary of Low Output, High VSWR, Over Temp Alarms
CONTROLS
CTRL(Partial Power Cutback) SH/D (External Power Control)
Copyright Crescend Technologies 2 Rev O
Table 1-2. Input/Output Power, Current, Spurious and Harmonics
Input Power Range (W)
0.1-0.2
0.2-0.5
0.5-1 1-2 2-5
5-10 10-20 20-50
Rated Output
Power (W)
80 (P8)
100 (P10)
Typ Current
(A)
18 21
Max Current
(A)
23 26
NOTES:
All specifications above apply at +13.8 ± 0.1 VDC operating voltage,
Manufacturer’s Rated Output Power of this Equipment is for Single Carrier Operation.
ambient temperature of 25°C ± 5°C.
Copyright Crescend Technologies 3 Rev O
2. INSTALLATION
2.1. INTRODUCTION
This section contains installation recommendations, unpacking, inspection, and in stallation instructions for the amplifier. Carefully read all the material in this section prior to equipment unpacking or installation. Also read and review the operating procedures in Section 3 prior to installing the equipment. It is important that the licensee perform these tasks correctly and in good faith. If applicable, carefully read Parts 73 and 74 of the Federal Communications Commission (FCC) rules to determine how they apply to your installation.
2.2. ELECTRICAL SERVICE RECOMMENDATIONS
Crescend Technologies recommends that proper AC line conditioning and surge suppression be provided on the primary AC input to the +13.8 VDC power source. All electrical service should be installed in accordance with the National Electrical Code, any applicable state or local codes, and good engineering practice. Special consideration should be given to lightning protection of all systems in view of the vulnerability of most transmitter sites to lightning. Lightning arrestors are recommended in the service entrance. Straight, short ground runs are recommended. The electrical service must be well grounded. Each amplifier should have its own circuit breaker.
2.3. UNPACKING AND INSPECTION
This equipment has been operated, tested and calibrated at the factory. Only in the event of severe mechanical shocks or other mistreatment should any substantial readjustment be required. Carefully open the container(s) and remove the amplifier module(s). Retain all packing material that can be reassembled in the event that the unit must be returned to the factory.
CAUTION:
Visually inspect the amplifier module for damage that may have occurred during shipment. Check for evidence of water damage, bent or warped chassis, loose screws or nuts, or extraneous packing material in the connector or fans. Inspect the rear panel connector for bent connector pins. If the equipment is damaged, a claim should be filed with the carrier once the extent of any damage is assessed. We cannot stress too strongly the importance of IMMEDIATE careful inspection of the equipment and the subsequent IMMEDIATE filing of the necessary claims against the carrier if necessary. If possible, inspect the equipment in the presence of the delivery person. If the equipment is damaged, the carrier is your first area of recourse. If the equipment is damaged and must be returned to the factory, write or phone for a return authorization. Cresce nd may not accept returns without a return authorization. Claims for loss or damage may not be withheld from any payment to Crescend, nor may any payment due be withheld pending the outcome thereof. WE CANNOT GUARANTEE THE FREIGHT CARRIER’S PERFORMANCE.
2.4. INSTALLATION INSTRUCTIONS
This amplifier is designed for installation in a rack that permits access connection of DC power, RF, and monitor/control cables. The amplifier must have a minimum of 3 inches of open space to the rear to allow adequate ventilation.
To install the amplifier proceed as follows:
1. Install amplifier in equipment rack and secure in place.
2. Connect a 50 ohm antenna cable and load to the RF OUT connector on rear of amplifier.
3. Connect the transceiver/exciter output to RF IN connector on rear of amplifier.
4. If monitoring of PA is desired, connect alarm cable to “ALARM” pin on rear of amplifier module. See section 2.5 for more details.
5. If limited output power control of PA is desired, connect control cable or appropriate resistor to “SH/D” pin on rear of amplifier module. See section 2.5 for more details.
Exercise care in handling equipment during inspection to prevent damage caused by rough or careless handling.
to the rear of the rack for
Copyright Crescend Technologies 4 Rev O
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